Apparatus for applying medicaments, particularly into cavities of the human body



Aprl] 16, 1940 H FRQMM 2,197,689

APPARATUS FOR APPLYING MEDICAMENTS, PARTICULARLY INTO CAVITIES OF THEHUMAN BODY Filed Jan. 51, 1959 Patented Apr. 16, 1940 [PATENT OFFICE 7APPARATUS FOR) APPLYING MEDICAMENTS,

PARTICULARLY INTO -HUMAN BODY CAVITIES OF THE I Herbert Fromm, London,England Application January *31, 1939, SerialNo. 253,840

In Great Britain December 21, 1937 3 Claims.

'Ihis invention relates to an apparatus for injecting-medicaments, moreparticularly medicament of .-a creamy or semi-solid nature, into thecavities, canals or passages of the human body. The primary object ofthe invention is to simplify and cheapen the cost of manufacture withoutdetracting from the efficiency of the apparatus, and also tofacilitatethe cleaning and sterilizing thereof. 10'- The inventionbroadly consists of an openended tube, a compressible bulb attached oradapted to be attached to one end of said tube and means for permittingthe tube to be filled n from the remote end without allowing thecharging substance to enter the bulb, said means comprising a vent holein the tube, a floating piston within the tube, which is situatedbetween the vent'holeand thebulb, andmeans for covering said vent holewhilst-the contents of the tube is 20 expressed, the vent hole beingadapted to serve as an indicator as to the filled condition of the tube.

In a preferred form of'the device, the valve consists of a floatingpiston, and a stop is pro- 25 vided therefor adjacent the bulb andbetween said bulb and the vent hole, the piston being adapted to pushforward the charging substance and being prevented from passing out ofthe tube by the provision of a second stop. The, other 30 or outer endof the tube aforesaid may be plain externally and screw-threadedinternally for use with nozzles adapted to be fitted thereon with apush-on fit or with nozzles adapted to be screwed thereinto, saidnozzles being of any suitable shape 35 provided with an orifice ororifices having a diameter such as to meet different medicalrequirements, the internally threaded end of the tube also serving forthe screw-in reception of a hypodermic needle attachment. 40 For a readyunderstanding of the invention,

reference is to be had to the following description and accompanyingsheet of drawings, illustrative of a preferred embodiment of theinvention, and wherein:

45 Figure 1 is a vertical sectional view of the apin said push-in end ofthe tube and normally seated on a pin 4 mounted in and extendingdiametrically across said tube so that the piston. 3 is prevented. fromentering into the bulb 2,. said piston being slightly less indiameterthan '8 the internal diameter of the tube l aforesaid.

In the wall of the tube I and above the piston 3 there is provided avent hole 5 adapted to be covered over by a collar 6 which is slidably,'ror tatably and frictionally mounted'on the tube 1 10' aforesaid.

The free or outer end'of the tube l is'plain exteriorly and is providedwith a tapped portion 1 below which, and extending diametrically acrosssaid tube I, is a pin 8, the same preventing the escape of the piston 3through said outer end of the tube. r

To charge the tube I with medicament, the vent'5 is uncovered byupwardly sliding the collar 6, and the medicament is inserted into thetube through'the open outer end thereof, said vent 5 not only permittingof the escape of air displaced by the medicament, but also giving, by

Y exuding from the vent, a visible indicationthat the tube is fullycharged.

- The collar 6 is then slid back to cover over th 1 vent 5, therebypreventing the contents of the tube from being spilled or dropping outfrom the open end of the tube, and the appropriate nozzle is then placedover the open end of the tube, or

screwed thereinto, as the case may be, and the apparatus is ready foruse.

Alternatively, the apparatus may be used without a nozzle being aflixedto the open outer end of the tube thereof. a

The medicament is preferably fed from a collapsible tube having ascrew-thread nozzle fitted with a cap, the same being removed and thecollapsible tube screwed, by its nozzle, into the tapped open end of thetube of the apparatus, the collapsible tube then being squeezed to forceits contents into the tube of the apparatus, said collapsible tube thenbeing removed.

The tube of the apparatus may be of a shape in cross-section other thancircular, and may be made of synthetic resinous product, xylonite,ebonite, glass or of impervious paper or other suitable plasticmaterial, or it maybe made of any suitable metal, and it may be made toscrew into the mouth of the compressible rubber bulb instead of being apush-in fit in said mouth of the bulb.

The tube aforesaid will be made in various size lengths and diameter tocontain a specific quantity of medicament and thus obviate the necessityof having first to measure the quantity of medicament before filling thesaid tube, each tube being marked with the particular capacity of thetube.

Further, instead of a floating piston being employed, use may be made ofany other suitable form of non-return valve, e. g. a valve consisting ofa small rubber tube which is closed or sealed at the end nearest thecompressible bulb, but open at the other end so that, when pressure isapplied to the bulb to extrude the medicament, the air from within thebulb passes freely around the said valve.

The collar, which is mounted on the tube, and is or may be made of thesame material as the tube, may be formed with an opening therein tocorrespond with the Vent hole in the tube when in a certain position,that is, when the tube is being charged with medicament, said collarbeing rotated so that the holes are out of register with one anotherwhen the bulb is being compressed to extrude the medicament, and anyform of stop may be provided on the tube to limit the rotation of thesaid collar.

The floating piston, when the same is employed, serves the dual purposeof ensuring that the medicament does not pass beyond the end of the tubeand so into the bulb, and that when it is lifted by air pressure causedby compression of the bulb, and as only extremely small clearance isallowed between it and the wall of the tube, it ensures that the wholeof the medicament is expelled from out of. the said tube.

The easy removal of the bulb and nozzle from off the tube facilitatesthe cleaning and sterilizing of the parts and the replacement thereofand considerable time is thus saved.

I claim:

1. An apparatus for injecting medicaments into cavities of the humanbody, comprising an open-ended tube, a compressible bulbattached to oneend of said tube and means for filling the tube from the open end andpreventing a charging. substance entering the bulb, said meanscomprising a vent hole in the tube, piston means within the tube, meansfor causing said piston means to rest between the vent hole and thebulb, and means mounted on the tube for covering said vent hole whilethe contents of the tube is 'expressed, the vent hole whenuncovered'being adapted to serve as an indicator as to thefilled acondition of the tube.

2. An apparatus for injecting medicaments into cavities, of the humanbody, comprising a curved open-ended tube, a compressible bulb attachedto one end of said tube, an aperture in the wall of the tube andsituated near the compressible bulb, a stop within the tube and situatedbetween the aperture and the bulb, a second stop provided within thetube in spaced relation to the first mentioned stop, a floating ,pis-.v

ton adapted to traverse the tube between the said stops and shiftablemeans carried by the tube for covering and uncovering the aperture, theaperture being adapted, when uncovered, to serve as an air vent whilstthe tube is filled from its open end, and to serve as an indicator as tothe filled condition of the tube, the piston cooperating with the saidfirst mentionedistopto prevent the charging substance from entering thebulb.

3. An apparatus for injecting medicaments into cavities of the humanbody, comprising a curved open-ended tube, a compressible bulb attachedto, one end of said tube, an internal screw-thread in the other end ofsaid tube, an aperture in the wall of the tube and situated near thecompressible bulb, a stop within the tube and situated between theaperture and the bulb, a second step provided Within the tube in spacedrelationto the first mentioned stop, a piston adapted to traverse thetube between the said stops, and a slidingsleeve on the tube forcovering and un:

covering the aperture, the aperture being adapted, when uncovered,toserve as an air vent while the tube is filled from its open end, andto serve as an indicator as to the filled conditio-n'of the tube, thepiston co-operating with the said second stop to prevent the chargingsubstance from entering the bulb.

HERBERT FROMM.

